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DIRECTION:   Each of these questions contains an Assertion followed by Reason.
                 Read them carefully and answer the question on the basis of following options.
                 You have to select the one that best describes the two statements.

                 (a) If both Assertion and Reason are correct and Reason is the correct explanation
                 of Assertion.

                 (b) If both Assertion and Reason are correct, but Reason is not the correct
                 explanation of Assertion.

                 (c) If Assertion is correct but Reason is incorrect.
                 (d) If Assertion is incorrect but Reason is correct.

                 (e) If Assertion & Reason both are incorrect.
                       Assertion : Salts are the products of an acid-base reaction.
                 Q.4
                       Reason : Salt may be acidic or basic.
                 Q.5
                       Assertion : During electrolysis of concentrated aqueous solution of
                       sodium chloride, hydrogen is produced at anode and chlorine gas is
                       produced at cathode.
                       Reason : Ions get attracted to oppositely charged electrodes.

               SUBJECTIVE:

                 S.L                                 Questions                                  Mark    Skill
                 No.
                 Q.1    TRUE/FALSE                                                              1       R
                        There are a variety of strengths when you study acids and
                        bases.
                 Q.2    Classify the following salts into acidic, basic and neutral salts:      1       u
                        Potassium sulphate, ammonium chloride, sodium
                        carbonate, sodium chloride          [CBSE 2011]
                 Q.3    Give suitable reasons to justify the following statement:               3       R+A
                        An aqueous solution of sodium chloride is neutral but an
                        aqueous solution of sodium metal is basic.[CBSE 2016]
                 Q.4    Fill in the missing data in the following table.                        3       U+A


















                 Q.5                                                                            5       HO
                        (a) A salt is produced by reaction between an acid
                           and a base. Identify the acid and base from which                            T
                           the following salts have been formed:
                        (i) Na2SO4, (ii) NH4Cl, (Hi) KNO3, (iv) NaCl

                        (b) Which one of these will have pH less than 7 and why?
                           [CBSE 2012]



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